Description

Toyota ST202, SW20 1993 Repair Manual – Factory OEM Specs

If you’re pulling a cylinder head on a 3S-GE without the factory book, you’re guessing on torque sequences and bolt angles. That bends valves. This 495-page OEM repair manual from Toyota Motor Corporation (Pub. No. RM396E) prints the exact numbers the line workers used. No aftermarket interpolation, no third-party guesses. You get the same procedures that kept these engines together for hundreds of thousands of miles.

This manual covers the Toyota ST202, SW20 1993 Repair Manual for the 3S-GE engine found in the Celica and MR2. It’s not a Chilton or Haynes rewrite – it’s the original factory document scanned from the 1993 print run. Every torque value, every clearance spec, every diagnostic flowchart came straight from Toyota’s engineering department. I’ve been wrenching for 28 years and I still reach for this PDF when a SW20 shows up with a crank no-start. The ignition timing procedure alone (page 26 of the engine section) saves you from chasing ghosts.

Torque Specifications and Service Specs – No Guessing

The first thing I check in any manual is the torque table. This one lists cylinder head bolts in a specific sequence with a multi-angle tightening process: 29 ft-lbf, then 90°, then another 90°. The manual also gives crankshaft pulley bolt torque at 22 ft-lbf using SST 09213-54015 (90119-08126). Try finding that spec in a generic database. You can’t. The service specifications section covers valve clearance adjustment (intake 0.007-0.009 in, exhaust 0.011-0.013 in) and compression check values. If you skip the cold valve adjustment sequence, you’ll be pulling the cam cover again in 500 miles.

Cylinder Head Removal and Installation – Step-by-Step

The cylinder block section walks through cylinder head removal, inspection of the mating surface (max warp 0.004 in), and installation with new gasket. It calls out the exact tightening order – the illustration on the procedure page shows bolt positions numbered 1 through 10. The manual also covers crankshaft inspection and repair, including journal out-of-round limits and bearing clearance checks using Plastigage. Piston and con rod assembly is detailed with ring gap specs and orientation. You get the factory SST list (special service tools) so you don’t reinvent the wheel. I’ve seen guys break timing belt covers because they didn’t use the correct holding tool – this manual tells you exactly which SST to buy or make.

Acoustic Control Induction System – What the Manual Covers

The 3S-GE ACIS system modulates intake runner length via a vacuum-actuated valve. The manual includes a troubleshooting table for the VSV (vacuum switching valve) and checks for the actuator diaphragm. If your ST202 falls flat above 4500 rpm, this section shows resistance checks for the VSV coil (20-30 ohms at 68°F) and vacuum testing of the actuator. No guesswork – just a multimeter and a hand vacuum pump. The EFi system chapter covers fuel pump relays (separate for SW20 and ST202), fuel pressure regulator (38 psi at idle with vacuum), and injector resistance (13.4-14.2 ohms). The wiring diagrams at the ECU terminals tell you exactly which pin goes where.

3 Reasons to Use OEM Documentation Over Aftermarket

First, aftermarket manuals frequently transpose torque values between years. This is Toyota’s 1993 print – every spec matches the production run. Second, the diagnostic circuit diagram in this manual shows the actual ECU pinouts and signal paths. Third, the lubrication system section lists oil pump clearances (0.004-0.006 in for body clearance) that aftermarket books often round off, leading to oil pressure complaints. OEM documentation from Toyota 2L-T, 3L 1990 Repair Manual – Factory OEM Supplement follows the same engineering rigor. If you’re working on a diesel, that supplement keeps you out of trouble. For a 1996 Tercel, the Toyota Tercel 1996 Repair Manual – 1202 Page Factory Spec PDF covers the whole car. The Toyota B, 3B, 2B 1980 Repair Manual – Factory OEM Specs is another example of factory correct data.

Diagnostic Codes and ECU Troubleshooting – Step-by-Step

The diagnosis system section gives you the diagnostic circuit diagram, code reader procedures (no scan tool needed – jumper TE1 and E1), and code definitions. For the SW20, there’s a specific fuel pump relay check that involves measuring resistance between terminals and applying battery voltage. The manual also covers the ISC valve (idle speed control) adjustment: base idle speed is 700±50 rpm with the ISC connector off. If you get a code 22 (knock sensor), the manual tells you to check the sensor resistance (54-59 kΩ at 68°F) and the shield wire for shorts. The cooling system chapter splits radiator and fan circuits between SW20 (with A/C and without) and ST202. Torque for the thermostat housing bolts: 14 ft-lbf. Water pump bolt torque: 18 ft-lbf. All in the manual.

FAQ – Common Questions About This Manual

Does this manual cover the MR2 Turbo (SW20) with 3S-GTE?

No. This is specifically for the naturally aspirated 3S-GE engine. If you need the 3S-GTE, look for the separate turbo supplement.

Are the wiring diagrams in color or black-and-white?

Black-and-white. They are scanned from the original 1993 binder. Wire colors are indicated by abbreviations (e.g., R for red, L for blue). The diagrams are clean and readable at 300 dpi. I’ve used them to repair a no-start on a 1994 Celica in the shop – the ECU terminal chart on page [DATA NEEDED] saved me an hour of probing blindly. The manual also includes system circuit diagrams for the ignition, starting, and charging systems. You can trace the starter relay path for both SW20 and ST202 variants. The ignition coil primary resistance spec is 0.36-0.55 ohms. If your multimeter reads open, you found the problem.

What about valve clearance specs – are they cold or hot?

Cold. The manual states engine at normal operating temperature is not required – you set them with the engine cold. Intake: 0.007-0.009 in. Exhaust: 0.011-0.013 in. The adjusting screw lock nut torque is 13 ft-lbf.

Does this manual include the special service tool part numbers?

Yes. Every SST is listed with its number and application. For example, the camshaft sprocket holding tool SST 09213-54015 (component part 90119-08126). You can order from Toyota or fabricate your own using the dimensions in the manual. The oil pump removal tool SST 09214-30010 is also called out.

You’re dealing with a 1993 engine that has 495 pages of factory knowledge behind it. The only way to avoid comebacks is to use the same data the engineers wrote. Access the Factory Manual from AutoRepairManuals and get the corrected torque sequences, real-time flowcharts, and parts lists for the 3S-GE. Your engine will thank you.